Armature for dynamo-electric machines



(No Model.)

A. H. BOWMAN.

AEMATUEE ECE DYNAMC ELECTRIC MACHINES. No. 320,754. Patented June 23,1885.

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ALEXANDER H. BOVMAN, OF PACKERTON, PENNSYLVANIA.

ARMTURE FOR DYNAMIC-ELECTRIC MACHiNES.

SPECIFICATION forming part of Letters Patent No. 320,754-, dated `Tune23,l 138,5.

Application filed April 4, i885.

Z'o all whom it may concern,.-

Be it known that I, ALEXANDER H. Bow- MAN, a citizen of the UnitedStates, and resident of' Packerton, in the county of Carbon and State ofPennsylvania, have invented certain new and useful Improvements in anArmature for Dynamo-lilachines, of which'the following is aspecification.

My invention relates to that class of armatures for dynamo-electricgenerators, known as the Siemens type 5 7 and it has for its objectsimplicity of construction in combination with efficiency as anarmature.

It consists of links fastened together in sections, and of sectionsfastened together and to disks upon the shaft, the novelty consistingmostly in the disposition of the links and retaining-bolts.

In order that the invention may be clearly described the drawingsannexed may be referred to by letters, as follows Figure l is a view ofthe armature at right angles to the shaft, one of the sections (showning omitted. Fig. 2 is a view of in Fig. 3) bethe armature in thedirection of the shaft, and Fig. 4 isa view of one of the linkscomposing a section.

A is the shaft, upon which are two disks, B and B, fixed upon the shaftand connected by .rods @,provided with heads D on one end, and on theother end with screw-threads which screw into female screws in the diskB. The heads are like those of an ordinary carpenter or machine screwc., they contain slots to receive' a screw driver. rlhe links E areshaped as shown in Fig. 4, and are separated from actual contact bypieces of paper or other suitable insulating substance, F, of the samegeneral shape as the links. As shown in Figs. l and 3,each link isprovided with ears or lugs projecting 1to one side, said lugs serving toform air-passages when the links are put together to form the armature.The links lie side by side with paper between them,and through a hole,H, in the center of each pass rods @,provided with heads D oncorresponding ends, and on their opposite ends with screwthreads whichscrew into female screws in the farthest or last link measured from thatagainst which abut the heads of the rods. The said links containing ascrew thread are those shown in the eXtreme right in Figs. l and 3.

(No model.)

The method in which this armature is wound is not shown, as my-inventionrelates only to the construction of the frame-work of the armature.

From the description it may be observed that the construction differsfrom any heretofore made in two or three particulars, the principal ofwhich is more clearly shown in Fig. 3. The links of each section are allheld togetherl by one rod passing through the center and screwing int-othe last link, whereby the said links are held rigidly in the directionof the said rod. These links thus held together form a section of thearmature, and each section is seen to contain four longitudinal grooves,a and a and I) and b', which are adapted to contain wire, as in ordinarybobbins. Upon the rods C fit the ends of the links, each of which isshaped with a semicircular groove. rlhe rods C thus serve not only tohold together rigidly the disks B and B', but also t0 keep the sectionsin their proper position in a direction at right angles to the shaft.

The construction, as described, forms asimple, cheap, and effectivearmature adapted to be applied in a large class of dynamo-electricgenerators. Y

Having described my invention, what desire to obtain by Letters latentisl. In combination with the shaft of au armature of a dynamo-electricgenerator, two disks, B and B, fixed upon said shaft, links F, shaped asshown, and provided each with a hole, h, at or near the center, and withgrooves at the two ends,rods @,provided with the heads D on one end andscrew-threads upon the other, passing through the said holes 7L andscrewed into a female screw contained in the farthest link from the headD, and rods @connecting the two disks B and B, and each fitting into thegrooves at the ends of every link, substantially as described.

2. A section of an armature of a dynamoelectric generator, consisting oflinks E, provided with holes h at their centers and rods C', passingthrough said holes and adapted to retain the links in a definiteposition,substan tially as described.

3. In combination with. links E of a section of an armature of adynamo-electric generator, a rod, G, provided with the head D upon oneend and a screw-thread upon the other end,

said rod passing through holes 7L in said links and screwing into afemale screw Contained in the link farthest from the head D,substantially as described.

4. An armaturcsection consisting of links fastened together side by sideby means of a rod passing through holes at or near the eenter of each,substantially as described.

5. An armature-section composed of links which contain a hole at thecenter, said hole being adapted to receive a rod, and grooves at the twoends, said grooves being adapted to lit uponV a second rod parallel tothe rst, substantially as and for the purpose specified.

G. An armature section, provided with grooves a and a and b and b', andconsisting of links, shaped as shown,and connected side by side by meansof a rod passing through a hole perforated in each link, substantiallyas and for the purpose speeilied.

7. In combination with an armature-section composed of links heldtogether by a rod passing through their centers, grooves D at each endof each link, said grooves being adapted to receive a rod which connectsthe two disks B and B/,iixed upon the shaft ofthe armature,substantially as described.

8. In combination with links held together by a rod passing` throughtheir centers, an insulating paper,F,inserted between said links,substantially as described.

9. In combination with the two disks I3 and B', fixed upon the shaft ofan armature, rods G, connecting the said disks, and each rod f1ttinginto two grooves, each of said grooves belonging to adj aeent sectionsof said armature, substantially as described.

l0. In an armature, links each provided with small lateralprojections,substantially as shown and described, and l'or the purposespecified.

1l. In an ar1nature,links each having ahole at or near the center, asexnieiroular groove at each end, and lugs or ears upon one sidc,substantially as described and shown.

In testimony that I claim the foregoing as my invention I have signed mynaine in presence of two witnesses, this 24th day ol' March, 1885.

ALEX ANDER II. BOVM AN.

Vitnesses:

EDWARD E. Fnus'rnimAcnnn, JNO. S. LnN'rz.

